Stovepipe-thimble



R. SHURTLEFF.

STOVEPIPE THIMBLE.

APPLICATION FILED ocr. 3l. I9I4. IIEIIEwEn APR. 23, I9I9.

2 SHEETS-SHEET 1- R SHURTLEFF. STOVEPIPE lTHIMBLE. APPLICATION man 00.31.1914. nENEwED APR. 23. 1919.

1,32 1,675. Patented Nov. 11, 19

2 SHEETS-SHEET 2.

lven bor:

WQ Ralph Snurmeff by UNITED STATES @PATENT OFFICE.

RALPH SHURTLEFF, 0F ST. LOUIS7 MISSOURI,

STOVEPIPE-THIMBLE.

Application filed October 31, 1914, Serial No. 869,530. Renewed April 23, 1919.

To @ZZ fte/wm t may concern.'

Be it known that I, RALPH SHUR'rnnFF, a citizen of the United States of America, a resident of the city of St. Louis, State et Missouri, have invented certain new and useful Improvements in Stovepipe-Thimf bles7 of which the following is a Jfull, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to improvements in flue construction, and more specifically stated to a stove pipe thimble provided with means for preventing leakage of air or the escape of sparks, smoke or gas at the junetion of the stovel pipe and its receiver.

Figure I is a vertical section of achimney provided with a stove pipe .thimble embodying` the features of my invention.

Fig. II is an enlarged horizontal.V section taken approximately on line II-IL Fig: I.

Fig. III is an enlarged vertical section taken approximately on line III-III, Fig. I, looking in the direction indicated by the arrow.

Fig. IV is an enlarged detail View of the stove pipe collar. n

Fig. V is a fragmentary view showing the means for securing the stove pipe cellar to the stove pipe.

Fig. VI is an enlarged vertical section illustrating the means for connecting the stove pipe sections. y

Fig. VII is a topi or plan view ot the connecting device shown in IFig. VI, showing it applied to the stove pipe sections.

Adesignates a chimney which may be built of brick or other suitable material, and 1 designates a wall section forming part oit' the chimney structure. The wall section 1 is preferably a lire-clay frame havingan opening` ior the reception of a stove pipe section 2 an d also having an #ujn dercut "plaster receiving` flange 3 which surrounds the stove pipe section. The flange 3 is approximately in the form of a dove-tail adapted to interlock with the plaster l and adapted to lie between the plaster and the stove pipe to protect the plaster from the heat and also to prevent the plaster from being broken away at points adjacent to the stove pipe.

A thimble section 5 is preferably a metal tube arranged partly Within the circular opening in the wall section 1 and projecting therefrom as shown in Fig. I. To interlock the metal tube 5 with the fire-clay Wall sec- Specicaton of Letters Patent.

into the vroom .of the building Patented Nov. 11, 1919.

seriai No. 292,238.

tion 1, I preferably form `grooves 6 and 7 in the wall section and provide the tube' with lugs 8 which lie within said grooves. The lugs are retained in the grooves 6 and 7 by plugs 9 of cement or other suitable ma=` terial adapted to be firmly secured to the grooves.

The inner end portion of the thimble section 5 contains an internal annular seat 11 which engages the end portion of the stove pipe section 2. This annular seat is tapered so that the stove pipe may be firmly forced onto said seat with the result of contracting the inner end ot 'the pipe, thereby firmly engaging' the pipe with `its seat.v A very tight joint at the end of the pipe is primarily obtained by forcing the pipe onto the tapered seat, and since the pipe .maybe easily loosened from a seat oi' this kind,` I provide means for retaining the pipe in the position shown in Fig. I. 1

12 designates an anchor lug formed integral with the thimble section 5, adapted to be engaged by the inner end of the stove pipe and adapted to interlock with a hook 13 secured to the inner end `portion of the stove pipe. IV hen the stove pipe section 2 is iirmly engaged with its tapered seat 11 said stove pipe section is turned to interlock the hook 13 with the anchor lug` 12, thereby securing the stove pipe to the stove pipe thinr,

ble to maintain the stove pipe in engagement with said tapered seat 11.

1G designates the fall plaster ota room, and 17 designates studding between said plaster and the chimney. Topositively prevent the escape oi' sparks into the wall struc ture, or the leakage oi' gases, smoke or sparks g, or the leakage of air from the wall structure into the iiue, I securean outer tube 18 to the wall structure to produce a pocket 19 around the stove pipe section 2. The inner end of this pocket 19 is closed by a sheet of asbestos packing 20 surrounding the inner thimble section 5 and closely iitted to the inner end oi' the outer tube 1S. The outer face of the inner thimble section 5 is preferably tapered and the sheet ot asbestos packing is preferably provided with a circular opening for the reception of said tapered outer face. To insure a very irin contact, the circular inner margin of the packing is slitted to produce a series of yieldable tongues 20 which engage the tapered outer face of the inner thimble section 5.

.Tiieoutr- "slid 'of ai@ para iei'sjjeiosefr by a stove pipe collar 21 having an annular groove for the receptioiio'f asbestos packing 21 which lies between said collar 21 vandthe plaster 16.y This collar is preferably'made"u o f yieldable sheetd metal,and it is preferably f connectedy to the i'nner'thimble section' 5Y by Screws Passing: threus'lr said, 0011er` andY into said thimble section 5. The heads at the 4outer ends of screws 22 engage theouter face of the collar21, and these screws may be vadjusted to compress the packing 21 between thecollar 21 and the plaster 16, there-y by positively preventing `the escape of sparks, smoke orgases at the outer edge of stove pipe collar. An asbestos packing ring 21a, secured totheinner margin of the col- .3. lar'2l, is lpreferably slitted as shown in Fig.

kIV to produce a series of yieldable tongues which iir'mly lengage the outer face of the stove pipe. f

f As previously pointed out, the stove pipe section 2 is securely held on its tapered seat Y11, by means ofthe hook 13 'which interlocks with thean'chor lug 12. However, the stove pipefsecti'on'may be loosened and removed from its'seat by turning-saidstove pipe sectionltoreleasefthe vhook'l from the anchor lugi12, land 1,? therefore, provide means for locking the stove pipe to prevent it from turninginIthe-thimble section 5. The stove pipefcollar 21 is prevented from turning by eff; the yscrews?22-which connect said collar to f The verticalmargins'of packingwis slidablyfitted to these guides so Ckoiiijesfjof this V.patent may be obtained for the thimble section-5', the latter being firmly interlocked with the wall section 1. To`

that :it may Vmove downwardly with the s; thimble: section `-'whenthe chimney structure settles. 'and moves downwardly.

It will be noted that-leakage of air fromk the buildingi structureinto the flue'as well as the escape of gases, smoke or sparks from Athe iiue luto the building structure 1s prevented bythe firmjoint at the inner end of V thestovepipe, and also by the stove pipe 'collar 21 and the packing 20 serving as closures vfor the ends of the pocket 19. j

A stove pipe section 30, fittedy to the stove pipe section 2, is provided with adepression 31 adapted to receive a latch device 32 secured to the section `2.v This'. latch device is preferably a small spring riveted to the stove pipe section 2 and adapted to pass through a hole 33 in saidsection so as to interlock with the section 30; The stove pipe sections are securely connected by the latch device and the latter may be readily unlocked iby removing its free end from the depression L v I claim 1. An article of the character described comprising a frame adaptedto be mounted in a {iue opening, a thimble secured to said frame and projecting beyond an end thereof, a tube surrounding the projecting end of said thimble, and a collar coperating with said tube to form a chamber, the joints of which are sealed.

2. An article of the character described comprising. a frame adapted to be mounted in a flue opening, a thimble Secured to said frame and projecting beyond an end thereof, a tube surrounding the projecting end yof said thimble, and a collar secured to said thimble and Coperating with said tube to form a chamber, the joints of which 'are sealed. y

3. An article of the character described comprising a frame adapted to be mounted in a flue opening, a thimble secured to said frame and projecting beyond anend thereof, a tube surrounding the projecting end of said thimble, a packing surrounding said thimble to which the inner end lof said tube is fitted, and a collar coperating with said tube to form a chamber, the inner end of which is closed by said packing.

RALPH SHURTLEFF.

five cents each, by addressing the Commissioner of Patents Washington, D. C. 

